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CondominiumResidential
$1,101,892$788 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 87How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $1,060,000 on Mar 4, 2024

20 MARLBORO ST

BELMONT, MA 02478
Building report
2
Beds
3
Baths
1,399 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
1913
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.1M
$960K low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,060,000 · Mar 4, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$12,575 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$1,104,000 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,104,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,080,910

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyMIDDLESEX
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.2017
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Winthrop L Chenery Upper Elementary SchoolA-
Middle · Grades 4–6 · 0.9 mi
E
Roger E WellingtonA
Elementary · Grades PK–3 · 1.3 mi
H
Belmont High SchoolA+
High · Grades 9–12 · 1.3 mi

District: Belmont School District

Neighborhood · ZIP 02478These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.55
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.103
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.74

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.27,636
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.5,959 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$162,650
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$213,185
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.47 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

20 Marlboro St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth less than 77% of homes in Belmont 02478
  • Costs more per square foot than 91% of homes in Middlesex County
  • Smaller than 83% of homes in Belmont 02478
  • Older than 86% of homes in Belmont 02478

What homes are worth in Belmont 02478

Each bar is how many homes fall in that price range. The marker is this home.

This home
$593K$3.6M

This home is worth more than 23% of homes in Belmont 02478.

How it measures up in Belmont 02478

The dot is this home. The mark in the middle is the typical home in Belmont 02478.

Estimated value$1,101,892
CheaperTypical $1,469,648Pricier

Pricier than 23% of homes nearby

Price per ft²$788
CheaperTypical $724Pricier

Pricier than 69% of homes nearby

Living area1,399 ft²
SmallerTypical 2,124 ft²Bigger

Bigger than 17% of homes nearby

Year built1913
OlderTypical 1930Newer

Newer than 14% of homes nearby

How 20 Marlboro St ranks against every home in each area.
MeasureThis homeBelmont 02478Middlesex County
Estimated valuepricier than$1,101,89223% of homes76% of homes
Price per ft²pricier than$78869% of homes91% of homes
Living areabigger than1,399 ft²17% of homes30% of homes
Year builtnewer than191314% of homes20% of homes

About 20 Marlboro St

How much is 20 Marlboro St, Belmont, MA worth?

The TopHap Estimate for 20 Marlboro St, Belmont, MA is $1,101,892 as of Aug 30, 2026. The likely range is $959,597 to $1,244,187. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Marlboro St, Belmont, MA last sell?

20 Marlboro St, Belmont, MA last sold on Mar 4, 2024 for $1,060,000, according to the county's recorded deed.

How big is 20 Marlboro St, Belmont, MA?

20 Marlboro St, Belmont, MA has 2 bedrooms, 3 bathrooms and 1,399 square feet of living space.

When was 20 Marlboro St, Belmont, MA built?

20 Marlboro St, Belmont, MA was built in 1913, making it 113 years old. It is a condo/apartment home. The building has 1 story.

What schools serve 20 Marlboro St, Belmont, MA?

20 Marlboro St, Belmont, MA is assigned to Winthrop L Chenery Upper Elementary School (middle), rated A-; Roger E Wellington (elementary), rated A; Belmont High School (high), rated A+. All sit in Belmont School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Marlboro St, Belmont, MA compare to other homes in Belmont 02478?

Among the 7,995 homes in Belmont 02478, it is worth more than 23% of them ($1,101,892 against a typical $1,469,648), its price per square foot is higher than 69% of them ($788 against a typical $724), it is bigger than 17% of them (1,399 ft² against a typical 2,124 ft²) and it is newer than 14% of them (1913 against a typical 1930). Measured against all of Middlesex County, it is worth more than 76% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 20 Marlboro St, Belmont, MA?

The 2025 property tax bill for 20 Marlboro St, Belmont, MA was $12,575. The county assessed it at $1,104,000.

More homes on Marlboro St

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